随机集港的出口箱堆存策略设计与仿真

Stacking strategy design and simulation for export containers arriving at port in random sequence

为降低集装箱堆场的翻箱率,研究在船舶到港前已经获知出口箱属性的情况下随机集港的出口箱堆存策略.在分析出口箱已有堆存策略的基础上,提出一种以平面箱位为分配单元的改进型堆存策略.对该策略的步骤进行详细阐述,给出模型的假设条件、评价指标和组成模块,利用仿真软件Flexsim建立集装箱堆场仿真模型,分析不同堆存策略的效果.以某集装箱码头为例进行仿真分析,结果表明:在堆场利用率相同且高于70%的情况下,采用改进型堆存策略所带来的翻箱率远远低于其他已有堆存策略。

To reduce the reshuffle rate for the container yard,a stacking strategy is studied for the export containers which arrive at port in a random sequence under the condition that the containers＇ attributes are known before the ship arrives.On the basis of analyzing the existing stacking strategies for export containers,an improved stacking strategy is proposed which takes the ground slot as allocation unit,and the steps of the strategy are elaborated.The assumptions,evaluation indices and components are given,and the simulation model of the container yard is built to analyze the effect of different stacking strategies by the simulation software Flesxsim.A container terminal is taken as an example for the simulation analysis.The results show that the reshuffle rate brought by the improved stacking strategy is much lower than that brought by any other existing stacking strategy under the same container yard utilization which is higher than 70%.